Which of the following is true about special$-$order decisions?

Question $4$Select one:

a$.$

A product can be sold at a once$-$off special price below its cost price, but above its variable cost per unit, if the company has spare capacity available in the short term

b$.$

A product can be sold at a once$-$off special price below its cost price, even below its variable cost per unit, if the company has spare capacity available in the short term

c$.$

A product can continually be sold at special prices below its cost price, but above its variable cost per unit, if the company has spare capacity available in the long term

d$.$

A product can continually be sold at special prices below its cost price, even below its variable cost per unit, if the company has spare capacity available in the long term

e$.$

It is never wise to sell a product at a price below its cost price